09-13-2011 03:01 PM - edited 03-07-2019 02:12 AM
if two switches are set to be server in a same vtp domain. which one will be the master or them just exchange vlan info and update themselves.
thanks
09-13-2011 03:15 PM
The one with the higher revision number will be the master's master.
Be careful of this setup. I've seen VLAN database disappear with this setup.
09-14-2011 02:59 AM
Hi,
IMHO, VLAN database cleared accidentally is a general danger of VTP, no matter of the server number.
On the contrary, it had been dangerous in the past to run a single server in your VTP domain as the VLAN database had been saved on servers only.
This is not valid anymore, but still it's recommended to have multiple VTP servers in the domain as they are only places to configure the VLAN database.
So if you decide to run VTP, it's worth having two servers at least.
HTH,
Milan
09-13-2011 04:45 PM
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Posting
Assuming both are properly sync'ed to begin with, updating either will update the whole VTP domain. Recall (?) if both are updated at almost the same time, you can lose one of the server's updates.
09-13-2011 07:26 PM
VTP server is the default mode. The one with higher cofig-revision number will overwrite the information or in other words, will be the master. But, be very careful while adding servers and clients to your VTP domain. Make very sure they have a lower rev level or it can cause major issues with your network. Some people think that a client can't over write a server but that is incorrect, if your add a VTP client to your domain and it has a higher rev level it will over write the server.
Sweta
Please rate useful posts.
09-14-2011 03:54 PM
The best way, is setup the switch in client mode and then change the switch to server mode.
When the switch is in client mode, the switch will be update the version and other parameters (through the switch(es) in server mode), and then change the switch to server mode.
With this procedure there’s nothing to be worry (100% guaranty).
ADAJio
09-14-2011 06:06 PM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Actually adding a VTP client can "zap" your VLANs (if its rev number is higher). The correct way is to set the switch to transparent mode, which resets the revision, add the switch to the network, and then setting it to client or server mode as needed.
11-18-2020 12:08 AM - edited 11-18-2020 12:08 AM
I don't thing so.
Switch(config)#vtp mode client
Setting device to VTP CLIENT mode.
Switch(config)#vlan 44
VTP VLAN configuration not allowed when device is in CLIENT mode.
Switch(config)#
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